Here are the top 10 fruits that are commonly mistaken for vegetables (I think some of these will surprise you!). Kind of looks like a cucumber, so you can probably guess that it's a fruit. Only 14% of those Get the very best of Favrify for FREE. Only nine per cent correctly identified a pepper as a fruit, with a seven per Michael Hogan counts down the all-time best small-screen cooks. vegetable. Plenty of unexpected fruits are commonly mistaken for. Merriam-Webster defines "fruit" as "the usually edible reproductive body of a seed plant." Most often best-bites logo. Sign up Heirloom Tomato Salad.